Hi,
If i’m right, you just want to avoid user with back-end access to make change on ACF. I don’t know if you can disabled field editing on specific environnement (live and staging) but you can simply change the capability needed to access ACF editing with the ‘acf/settings/capability’ filter.
I made the same for my website :
1) Create a specific capability named ‘edit_acf’
2) Set this specific capability as access rule for ACF with ‘acf/settings/capability’ filter
3) Add the specific capability only to role/user you want
This will not make your “staging ACF json” as “source of truth” but you’ll be sure that’s user can make change.
Hope it’s solve your issue
